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Mungerjiang 2a2c1f5b4c x86/kvm: Add nopvspin parameter to disable PV spinlocks 
upstream:05eee619ed61c8cd89633954d38c4e5653086845

    x86/kvm: Add "nopvspin" parameter to disable PV spinlocks

    There are cases where a guest tries to switch spinlocks to bare metal
    behavior (e.g. by setting "xen_nopvspin" on XEN platform and
    "hv_nopvspin" on HYPER_V).

    That feature is missed on KVM, add a new parameter "nopvspin" to disable
    PV spinlocks for KVM guest.

    The new 'nopvspin' parameter will also replace Xen and Hyper-V specific
    parameters in future patches.

    Define variable nopvsin as global because it will be used in future
    patches as above.

    Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
    Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
    Cc: Jonathan Corbet <corbet@lwn.net>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: "H. Peter Anvin" <hpa@zytor.com>
    Cc: Paolo Bonzini <pbonzini@redhat.com>
    Cc: Radim Krcmar <rkrcmar@redhat.com>
    Cc: Sean Christopherson <sean.j.christopherson@intel.com>
    Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
    Cc: Wanpeng Li <wanpengli@tencent.com>
    Cc: Jim Mattson <jmattson@google.com>
    Cc: Joerg Roedel <joro@8bytes.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Will Deacon <will@kernel.org>
    Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 		2021-11-30 15:42:10 +08:00
..
alpha alpha: fix annotation of io{read,write}{16,32}be() 2021-03-16 16:34:34 +08:00
arc arc: kernel: Return -EFAULT if copy_to_user() fails 2021-05-20 16:07:08 +08:00
arm ARM: dts: uniphier: Change phy-mode to RGMII-ID to enable delay pins for RTL8211E 2021-05-20 16:08:00 +08:00
arm64 ampere/arm64: Work around Ampere Altra erratum #82288 PCIE_65 2021-07-12 08:57:22 +00:00
c6x Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
csky csky: change a Kconfig symbol name to fix e1000 build error 2021-05-20 16:07:15 +08:00
h8300 h8300: fix PREEMPTION build, TI_PRE_COUNT undefined 2021-04-12 12:52:05 +08:00
hexagon hexagon: define ioremap_uc 2021-03-16 16:27:29 +08:00
ia64 ia64: fix discontig.c section mismatches 2021-05-20 16:07:15 +08:00
m68k m68k: mvme147,mvme16x: Don't wipe PCC timer config bits 2021-05-20 16:07:48 +08:00
microblaze Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
mips MIPS: pci-legacy: stop using of_pci_range_to_resource 2021-05-20 16:07:58 +08:00
nds32 nds32: flush_dcache_page: use page_mapping_file to avoid races with swapoff 2021-05-20 16:06:56 +08:00
nios2 Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
openrisc openrisc: Fix issue with get_user for 64-bit values 2021-03-16 16:39:36 +08:00
parisc parisc: avoid a warning on u8 cast for cmpxchg on u8 pointers 2021-05-20 16:06:56 +08:00
powerpc powerpc/52xx: Fix an invalid ASM expression ('addi' used instead of 'add') 2021-05-20 16:08:00 +08:00
riscv riscv: Fix spelling mistake "SPARSEMEM" to "SPARSMEM" 2021-05-20 16:07:11 +08:00
s390 KVM: s390: split kvm_s390_real_to_abs 2021-05-20 16:07:43 +08:00
sh sh: dma: fix kconfig dependency for G2_DMA 2021-04-12 12:51:39 +08:00
sparc sparc64: Fix opcode filtering in handling of no fault loads 2021-04-12 12:53:23 +08:00
um um: mm: check more comprehensively for stub changes 2021-04-12 12:52:40 +08:00
unicore32 Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
x86 x86/kvm: Add nopvspin parameter to disable PV spinlocks 2021-11-30 15:42:10 +08:00
xtensa xtensa: move coprocessor_flush to the .text section 2021-05-20 16:06:49 +08:00
.gitignore Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
Kconfig Revert: "ring-buffer: Remove HAVE_64BIT_ALIGNED_ACCESS" 2021-03-16 16:43:47 +08:00